摘要
500kV辽阳变电站2号主变压器在送电过程中发生两次充电保护动作跳闸,通过对保护动作情况、故障录波装置的分析及当时系统负荷的调查,用试验仪重新模拟故障对充电保护进行试验,通过反复试验和大量计算,并对事故过程、检验条件、试验方法及试验结果综合分析,发现充电保护之所以动作是由于主变二次侧合环时系统电流中含有大量直流分量造成的。
The charge protection operation of the 2# main transformer of Liaoyang 500 kV substation happened two times during the electricity transmission.Through analysing and investigating the circumstances of protection operation, the stoppage record electricwave insallation and the system of electric charge at that moment. We tried to imitate the effection,which the stoppage brings to the charge protection by using the experiment equipment again. By testing repeatly, caculating a vast amount of data and analysing comprehensivly the course of accident, the method of test and the result of test, it found the reason that all breaker of the main transformer was taking off when the breaker of the main transformer middle side closed. It was because the charge protection electric current contained a large of DC component.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第4期137-139,共3页
Power System Protection and Control
关键词
保护
跳闸
直流分量
protection
tripping
DC component
